Valve-grinding tool.



H., B. L P. HORN. VLVB GBINDING Toot.

APPLICATION IILBD MAB..10,1913.

1,073,686, Patented Sept. 23, 1913.

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H., B. & P. HORN. VALVE GBINDING TOOL.

APPLICATION FILED 1111111.10, 1913.

1,073,686. Patented sept. 23, 1913.

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fa/'man Horn/1W ervzard ,lo/rv Peter' Harm @Homey narran erratas rait-iena HERMAN HORN, BERNARD HORN, AND PETER HORN, OF WASHITA' :UN'LUL OKLAHOMA..

VALVE-GRNDING TOOL.

Specification of Letters Patent.

Paten-tod Sept. 153. iti l Application led March 10, 1913. Serial No. 753,387.

To all whom t may concern:

Be it known that we, HERMAN HORN, BERNARD HORN, and Pn'rnr HORN, citizens of the United States, residing in the county of lVashita and State of Oklahoma, have invented new and useful Improvements in Valve-Grinding Tools7 of which the following is a specification.

This invention relates to manually operated valve grinding tools ot' the portable type designed tc impart an Oscillating movementto the valve being,` ground.

The invention has for its main object to provide a tool of this nature which (a.) may be adjusted for light or heavy `grinding, (b) will automatically adjusty itself into alinement with the valve during the operation of the tool, (c) is provided with oppositely extending handles movable longitudinally ot the tool for operating it whereby the pressure exerted on the handles will be distributed evenly on thev opposite sides otl the tool and minimize the tendency of the tool to move out ot alinement with the valve, as in prior structures of this nature, (d) is provided with a lost motion connection admitting the starting of the tool to acquire su'leient momentum before the valve is actuated, which connection insures an even grinding of the valve and renders the startingr ot the tool at each end of its stroke comparatively easy, and (e) has an otl'set eX- tended portion tor use in confined places where tools ot this nature eannot ordinarily be used.

The above and other objects of this invention are accomplished by providing a tool having a main shaft with a eross bar mounted at its middle portion on the shaft and to slide longitudinally oi the shatt, the Crossbar having handles: on its outer ends and having secured thereto the opposite ends ol a cord or other flexible operating member.

the middle portion of whic 1 is secured to the upper end ot the shaft.

The turning of the shaft. winds the middle portion of the cord thereabout, to raise the cross-bar. Downivard pressure on the opposite ends ot the cross-bar draws the opposite ends of the oord and rotates the shaft in an opposite direction. An expansible momentinn or tlv Wheel is seeured to the sha'tt to insure the steady and even turning ot` the sliatt and the winding ot the eord tlulfraboutl at'ter tlu` downward thrust ot the handle bar.

rllu.I Il v wheel may bo expanded to obtain a relatively slow and powertul nnivoinent olI the tool when heavy grindingr is to be drne, and niay he rontraitted to seeure a rela tively iluieli and less powerful movement ot' the tool when light grinding` is to he done. rl`he valve engaging part o'l the tool is altaehed to the shalt by a suitable eonnection admitting ot the tree turning ot' the shalt througli a predeteriuined period ot a revolution prior to the turning` olf thtl tool. the oon nertion admitting oit this lost motion upon tlu` turning ot the shaft in either direetioo.

'lhe tool is provided with an ollset or an gular extension whirh may be quickly al1- taehed to or removed Atroni the tool, and by means Ot' which the. operations ot they tool may be Carried on in oontined places which will not aeeonnnodate or permit the operation ot the tool.

(lther objects and advantages of this in vention will appear troni the 'following specific diseloure ot the saine as set, torth in they below detailed description and ar eoinpanying drawings, in whieh:--

Figure l is an elevational view of the tool in operative position. AFig. 2 is a section on the line 2N2 o'l' Fig. l.. Fig. l is a detail view ot the momentum or tty wheel one ployed. Fig. Alis a sectional view through the valve engaging tool connection. ltig. f1 is a transverse section through thi.l saine. Fig. t3 is a detail view ot" the extension attarlnnent as applied to the lower end oli the tool. Fig. 7 is an elevational view ol' the outer end otl the extension nleuiber showing in ser-- tion the eonneetion Yfor the ge rs. Fig. tl ifi-z a view in elevation ot' another Yt'orin of valve engaging tool, showing the applieation ol the saine to a valve.

4`{eferring to the drawings in whirh lile characters ot reterenre desitniatrl similar parts throughout the several views-l, l() t' ignates a spindle arranged vertirally and provided upon its upper end with an en larged or drum portion 1l, about which is adapted to wind the intermediate portion of a' cord 12, or other flexible operating member. The intermediate portion of the cord 12 is passed up through opposite ends of a retaining plate 13, which plate lits snugly over an angular extension 14 of the spindle 10, as shown to advantage in Fig. 1. The ends of the cord l2 extend oppositely from the drum 11, and are secured to the opposite outer ends of a cross bar 15. The cross bar 15 is .supported upon a T 16 slidable longitudinally upon the spindle and arranged below the drum 11. Upon the extremities of the cross bar 15 are mounted a. lpair of handles 17 adapted to be grasped by the operator and pressed down in a direction longitudinally of the spindle 10, whereby to unwind the cord 12 from the drum 11, and rotate the spindle 10.

In order to cause a steady and easy rotation of the spindle 10, the spindle is proits intermediate portion a weight 20, the

vsame being preferably located against the inner side of the spring 19, and being grooved in its outer face `whereby to snugly receive the intermediate portion of the spring 19 to insure the securement of the weight 20 to the spring and prevent the turning of the wei ht, The weight 20 is secured to the spr. ng 19- inmany., suitable manner, as by a rivet 21 pas shown.

The lower end of the spindle 10, as best seen in Figs. 4 and 5,is provided with a groove 22 extending nearly all the way around the spindle, theportion of the spindle between the ends of the groove 22 constituting a-stop 23. A sleeve 24 engages over the lower end of the spindle, and carries a stop pin 25, the same preferably comprising a set screw, as shown in the accompanying drawings. From Fig. 4 it will be noted that the set screw engages in-the groove 22, and upon rotation of the spindle 10 within the sleeve through nearly a complete revolution the stop 23 engages the stop pin 25, and the sleeve 24 is thereby carried with the spindle. vWithin the lower end of the sleeve 24 `is fitted the shank of a valve engaging tool 26, the same being disclosed in Fig. 1 as comprising a forked arm, the ends of which are reduced to engage in corresponding openings or recesses usually found vin the upper faces of valves of internal combustion engines.

Loa/asse 1n Fig. 8 is disclosed in elevation another form of valve engaging tool 26a, wherein the lower end is flattened and rounded to provide a blade adapted to engage in a kerf in the upper face of the valve, as shown in dotted lines in Fig. 8.

1n the operation of this tool the spindle 10 is rotated by hand sufficiently to wind a portion of the cord 12 upon the drum 11, as shown in Fig. 1. The spindle 10 is inserted at its lower end into the head of a cylinder 27, and the valve engaging tool isadjusted to the valve in the engine cylinder head. The operator now moves the` cross bar 15 down by pressure on the handles 17, whereby the cord 12' is drawn taut, and causes the rotation the drum 11 and the spindle 10. This turning of Ithe spindle 10 rotates the fly or momentum wheel, the same being fixed onthe spindle 10, andthe momentum of the fly wheel is sufhcient to carry the spindle in its forward turning movement 'to rewind the cord 12 upon the drum 11, but in an opposite direction. Astliecord 12 is rewound upon the drum 11, the cross bar 15 is drawn up. The operator again presses down upon the handles 17, which action unwinds the cord 12 from the drum 11, and rotates the spindlelO in a reverse direction. Subsequent to each thrust of the cross bar 15 the fly wheel effects the continued rotation of the spindle 10 sufficient to rewind the cord 12 upon the drum in an opposite direction. Thus a reciprocating` motion is imparted to the spindle and to the valve which is connected to the same. At intervals during this operation the tool is removed from the valve, and a quantity of flour of emery, carborundum, or a like vgrinding substance is placed between the valve and its seat, when lthe tool is replaced on the valve and the operation continued.

From Figs. 1 and 3 it will be noted that the fly wheel may be expanded or collapsed, the fiy wheel being expanded when it is desired to obtain greater momentum to the tool in grinding relatively large valves` or valves offering considerable resistance. When such heavy work is not to be done with the tool. it is found more desirable to collapse `the fly wheel. as shown in F ig. 3, whereby a relatively quick motion and suiiicient power' is had for operating ordinary valves. The fly wheel is adjusted to spread the weights 2()` and to draw the same together by moving theblocks y1S toward andfrom each other respectively.

The lost motion connect-ion had between the valve engaging tool and the spindle admits of the starting of the spindle in its ro- `.tation in either direction before the valve is connected to the spindle, so that sufficient momentum to the tool is had to overcome any friction between the valve and its seat which might otherwise stop the tool.

ln the use of tools of this nature it is frequently found that the valves are so positioned in the cylinder head, and the cylinder is so Iloca ted upon the motor vehicle or other mountingfor the engine that the valve tool cannot be used. To overcome this dil'liculty this invention provides an extension or an- ,e'le portion for the tool by means of which the operations of the tool may be carried on in these confined or restricted places. ln lligg. o of the drawings such an instance is shown, and the figure also shows the im proved extension applied to a valve under such conditions. The cylinder 2S is shown as located partly beneath the dash board 29 of a motor vehicle, and in such position that the tool as disclosed in Fig. l can be applied. to theyvalven The lower end of the spindle l is removed from the sleeve 2l and seated in a socket. plug 30, the shank of which is screwed into any available threaded opening in the upper end of the cylinder 28. lhe tool rises from the socket plug 3l), as shown in Fia'. l, and may be operated as above described. A bracket 231 is carried by the tool and provided with spaced sleeves 32 through which the spindle l0 passes. Between the sleeves 32 is disposed a beveled gear 33 secured to the spindle by a set screw or other suitable adjustable fastening means. The bracket is also provided with a bearingr 3st supporting' a shaft 35 upon the inner end of which is secured a second beveled Aear wheel 36 meshing with the lear 33. The shaft extends considerably beyond the bearing 34, and is provided with a relatively wide groove 37 extending nearly all the way around the shaft 85. The portion of the shaft 35 between the ends of the constitutes a stop 38 adapted to strike a stop pin 39 carried upon the bored portion 40 of an outer shaft section lll. The shaft projects into the bored portion Ll0, and is locked to the same by the stop pin 39. The outer shaft portion 41 is reduced at its end, and has such end mounted in a bearing l2 of an outer bracket 43. A beveled gear 44 is mounted upon the outer section 41 of the shaft, and bears against the outer end of the bearing' lll. The bracket lf3 is provided with a pair of spaced sleeves 45 through which is slidably disposed a reduced spindle 4to. A second beveled ,gear #L7 is keyed upon the reduced spindle 4G between the sleeves 45, the gearl 4T meshing with the gear 44;, and being;` mounted to slide longitudinally upon the short spindle 4G. is provided with any suitable valve engaging member, shown in Fig. 6 as comprising a forked arm. the ends of which are seated in depressions or recesses formed in the upper face of the valve, 1

For the purpose of exerting a yielding pressure upon the valve te force the saine upon its seat, and

,groove 37 The spindle 1-6 to 4aceonlineclate inequalities in the grinding and operation of the tool, the short spindle fl-i'i is provided with tension means for holdingV it down against the valve. 'lhis tension means is shown in Figs. l5 and T, whereby a lower semi-ellipti(l spring; #ld is mounted upon the short spindle -ll at its middle portion. and is held up against the lower side of the outer sleeve 4G by a second semi-elliptic spring y4l). The spring atl) has a reduced openingl at its lower portion through which projects the stud constituting a reduced portion of the short spindle 4G, and forming a shoulder to support the spring 40. The ends of the springs 18 and fill are connected together in any suitable marmer, as by nuts and bolts, as Ishown at 5l, whereby the springs Lll-b and L19 are not only connected together but are placed under the desired tension. The lower spring Is held against f the lower end of the sleeve flo, and tends to d aw the upper spring;r down toward the sleeve fk5. Since the spindle has a shoulder engaging the upper spring 49, the short spindle Lt6 is yieldingly held down upon the valve.

The operation .of this extension is as follows: lVhcn the spindle l0 is rotated the gear wheel 33 is carried therewith, and ro tates the gear wheel 36, turning,- the shaft 35. When the stop 3S on the shaft 35- is turned sullicicntly to engage the stop pin 39, the shaft extension portion l,tl is turned with the spindle 10. By means of the gears Akl and 47 the short spindle 4G is rotated, thus rotating the valve connected to the spindle 46. In order to support the extension portion of the tool upon the cylinder Q8, a suitable bracket 52 is employed which is seemed at one end by a screw bolt 53 to the top of the cylinder, which has its 0pposite end detachably secured to the bearing l2 by means of the winged nut 54 carried upon a threaded stud The upper end of the bracket 52 is forked, the arms of which extend beneath the winged nut 54 on opposite sides of the stud 55.

lNhat is claimed ism l. In a valve grinding tool and in combi nation, a spindle, operating means for rotating the spindle, a fly wheel on the spindie for increasingr the iuon'icntum thereof, a valve engaging` part, and connecting means between said part and the spindle, said conneeting means comprising a stop on one side of the spindle and a stop on oneside of the valve engaging part, said spindle beine' adapted to rotate through a predetermined part of a revolution prior to the abutting of said stops.

2. ln a valve grinding' tool, and in combination, a spindle, means carried by the spindle for imparting a reciprocating rotary motion to the same and being movable in the .direction of the length of the spindle, a

{1y-Wheel on the spindle adapted for adjustment to increase and decrease the momentum of theiy-Wheel, a Valve engaging part, und n lost-motion connection between said valve engaging part and the spindle Whereby the tool may be started to gain momentum prior to turning said part.

In testimony whereof We have hereunto Levens@ set our hands in presence of tWo subscribing HENRY J'. RATSLAFF, PETER DALKE.

Gopes of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

